Back-seam trimmer.



No. 723,585. -PATENTED MAR."24,1903.

G. B. GORWIN. f BACK SRAM TRIMMER.

APPLICATION FILET DEO. 27, 1902.

lo MODEL. z SHEETS-SHEET 1.

Arron/VE ys I' 110.723.585. PATBNTBD 1542.53.24, 1903. c. B. GORWIN. BACK SEAM TRIMMBR.

APPLIoA'rIoN FILED mxo. 27, 1902. lo MODEL. v 2 sums-SHEET 2.

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UNITED STATES d PAT-ENT OFFICE.

CHARLTON B. OORWIN, OF JEFFERSON CITY, MISSOURI.

BACK-SEAN: TRlMlvil-:R-

SPECIFICATION forming part of Letters Patent No. 723.585, ldated March 24, 1903.

Application ille'd December 27, 1902. Serial No. 136,798. (No model.)

is preferably intended for use in connection" With the shoe-lining trimmer covered by Let-V ters Patent No. 707,906, issued tome onjAugust 26, 1902. It is not limited, however, toV

use with the machine referred to, but may' be employed advantageously in many other Y relations independently thereof. In case the present invention is used in connection with the invention covered by the Letters-Patent. above mentioned substantially the same framework, gearing, and knife may be employed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures. Figure 1 is aside elevation of ashoe-lining trimmer equipped with my present invention. Fig. 2 is a front elevation of the same. Fig. 3 is a section on the line 3 3 of Fig. 2 looking in the direction ofthe arrow. Fig. et is a plan view of the seam-guide and the revoluble cutter, other parts being removed for the sake of clearness. Fig. 5 is a plan view of a pair of lining-quarters with the back seam ready to be severed. Fig. 6 is a sectional plan view showing the seam las being severed. Fig. 7 vis a ,sectiontaken at right angles to Fig.6 and showing how the seam-guide carries the seam through the slot in the shield, and Fig. 8V shows the liningquarters after the seam is severed.

A frame 1 is mounted upon a base 2 and carries gearing 3 for. rotating a shaft 4t. Rigidly secured upon this shaft is a revoluble cutter 5, having, preferably, the form of a disk provided with a beveled edge and scoured in position by means of a knife-screw 6. Atable 7 is mounted upon the framework and is provided with a downturned edge 8, a spacing-block l0, and a gage 9, the spacingblock and the gage beingr of the kind described in my Letters Patent above mentioned.

AAslot 11 is provided in the edge 8 of the ta- -ble 7, through which slot the knife or cutter 5 partially extends, as indicated in Fig. 1. A shield 13 is provided with spring-tongue members 13n 13b integral therewith and is held in position by means of screws 14, secured at the bottom of the shield, the top of the shield be- -ing secured to the downturned member 8. The upper portion of the shield is provided withan aperture l5 for the purpose of admitting` the knife-screw 6, the lower portion ofthe shieldbeing provided with a mutilationh16, as indicated more particularly in Fig.

.2. The shieldA 13 is further providedwith a ,central slot 17, as indicated more particul'arly in Fig. 2.

A supporting-guide 1S is provided with a iiattened portion 18a, normally parallel with the slot 17, andwith a curved end 18", `as indicated by dotted lines in Fig. 2. The purpose of this guideis to direct the liningquarters in vtheir passage through the slot 17 and against the edge of the revoluble cutter. The lining-quarters to some extent rest upon the portion 18u of the supporting-guide during this operation. This supporting-guide prevents the under quarter from lagging upon the edge of the cutter and insures a smooth and definite cut. In other Words, the inclined edge of the cutter finishes severing the upper quarter a moment before it does the larger one, thus leaving uncut a small Width of trimming which tends to follow the movable edge of the cutter., and the supportingguide serves to prevent this undesirable effect.

The seam-guide is shown at 2O and is provided with a depending apron 20a, having slots 20", which are engaged by the adjusting-screws 20C, as indicated more particularly in Fig. 2. The seam-guide is preferably in the Vshape of a iattened horn, as indicated more particularly in Fig. 3, and is provided with a substantially V-shaped slot or mutilation 20e for admitting the beveled edge of the cutter 5. The seam-guide is further provided with a mutilation 20f to give proper clearance to the trimmed edges of the linings.

The lining-quarters constituting the stock to be operated upon are shown in Fig. 5 and consist of the members 2l 22, united together by a seam 23 and by a backstay 24 and secured to the backstay by seams 25 in the manner well understood in this art. The appearance of the lining-quarters after the seam is severed is indicated in Fig. 8, the edges 23a showing the removal of the seam.

My invention is used as follows: The apron 20 being properly adjusted by means ot the screws 20c and the revoluble cutter beingin motion, the operator grasps a pair of liningquarters and places them in the position indicated in' Fig'. 7, so that the members 2l 22 may be fitted over the outer or free end of the seam-guide 20. The stock is next forced toward the cutter, so as to follow the contour of the shield 13, the seam-guide serving to carry the seam 23 through the slot 17v and to direct the same against the edge of the revoluble cutter. It will be seen that as the cutter can only operate upon the seam 23, as indicated in Fig. 6, there will be no reasonable probability of any other part being cut.

It will benoted, too, that the feeding of the stock does not necessitate the fingers of the operator being placed in close proximity to.

the sharp edge ofthe cutter. The seam-guide 20 is adjustable relatively to the cutter 5, because if the apron 20 be moved to the right or to the left and adjusted by means of the screws 20c the substantially V-shaped slot 2Oc must approach toward or recede from the beveled edge ot' the cutter 5. This adjustment of the seam-guide is also desirablev for placing the same in slightly-different positions relatively to the slot 17.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A back-seam trimmer, comprising a frame, a revoluble cutter mounted thereon, a shield disposed adjacent to said cutter and provided with a slot, and' a seam-guide disposed adjacent to said cutter and partially extending into said slot, for the purpose of directing against said cutter the seam to be severed.

2. A backseam trimmer, comprising a frame, a revoluble cutter mounted thereon, a shield disposed adjacent to said cutter and provided with a slot, and a seam-guide mounted upon said shield and partially extending into said slot, for the purpose of directing against said cutter the seam to be severed.

3. A back -seam trimmer, comprising a frame, a revoluble cutter mounted thereon, a shield disposed adjacent to said cutter and provided with a slot, a seam-guide disposed adjacent to said cutter and partially extending into said slot, for the purpose of directing against said cutter the seam to 'be severed,

and means, controllable at will, for adjusting said seam-guide relatively to said cutter.

4. A back-seam trimmer, comprising a frame, a revoluble cutter mounted thereon, a shield disposed adjacent to said cutter and provided with aslot, and aseam-guide mounted upon said shield and partially extending through said slot and into proximity to said cutter.

5. A back seam trimmer, comprising a frame, a revoluble cutter mounted thereon, a shield disposed adjacent to said cutter and provided with a slot, a seam-guide mounted upon said shield and partially extending through said slot toward said cutter, and a supporting-guide mounted upon said frame and provided with a surface disposed at right angles to the general plane of said cutter and substantially parallel with said slot.

6. A back-seam trimmer, comprising a cutter, a shield disposed adjacent thereto and provided with tongues, and a seam guide mounted upon said shield and partially extending between said tongues an-d into proximity to said cutter. f

7. A back-seam trimmer, comprising a cutter, a shield disposed adjacent thereto and provided with a slot, and a member mounted upon said shield and partially extending through said slot, said member being provided With a mutilation for admitting the operating edge of said cutter.

8. A back-seam trimmer, comprising a cutter, a shield disposed adjacent thereto, and provided with a slot, a member mounted upon said shield and partially extending through said slot, said member being provided with a mutilation for admitting the operating edge of said cutter, and means for adjusting said member relatively to said shield.

9. A back-seam trimmer, comprising a cutter, a shield disposed adjacent thereto and provided with a slot, and a seam guide mounted upon said shield and extending partially through said slot, said seam-guide having substantially the form of a flattened horn and being provided with a slot for admitting a portion of said cutter.

l0. Aback-seam trimmer, comprisingacntter, av shield disposed adjacent thereto and -provided With a slot, a seam-guide mounted upon said shield and extending partially into said slot, said seam-guide having substantially the form of a attened horn and being provided. with a slot foradmitting a portion of said cutter, and means for adjusting said seam-guide relativelj,T to-said cutter.

IIO

11. A back-seam trimmer, comprising a cutl ter, a shield disposed adjacent thereto, and

provided with a slot, a supporting guide mounted adjacent to said cutter and substantially in alinement with one edge of said slot, and a seam-guide partially extending through said slot and into proximity to said supporting-guide and said cutter.

l2. 'Aback-seam trimmer, comprising acutl porting-guide having a surface substantially the form of a attened horn and partially eX- tending through said slot and into proximity to said cutter and to the supporting-guide, said supporting-guide being provided with a substantially V-shaped slotnormallydisposed in close proximity to said beveled edge of said cutter.

14. A back-seam trimmer, comprising a frame, a cutter having the form of a revolu? ble disk providedv with a beveled edge, a shield disposed substantially parallel with said cutter and provided with a slot, a snpporting-guide having a surface substantially parallel with saidslot, a seam-guide having substantially the form of a flattened horn and partially extending through said slot and into proximity to said cutter and to the supporting-guide, said supporting-guide' being provided With a substantially V-shaped slot normally disposed in close proximity to said beveled edge of saidcutter, and means, controllable at Will, for adjusting said seam-guide relatively to said slot.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

CHARLTON B. CORWIN.

Witnesses:

NELSON C. BURCH, JOHN E. FIsH. 

